Fixes the default value provided to the list parser

Move test_settings.py, test_db_cache.py, and test_remote_user.py to
paperless/tests/settings/ as they all directly test settings parsing
functions.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/paperless/settings/__init__.py

@@ -6,18 +6,25 @@ import math
 import multiprocessing
 import os
 import tempfile
-from os import PathLike
 from pathlib import Path
 from typing import Final
 from urllib.parse import urlparse
 
-from celery.schedules import crontab
 from compression_middleware.middleware import CompressionMiddleware
-from dateparser.languages.loader import LocaleDataLoader
 from django.utils.translation import gettext_lazy as _
 from dotenv import load_dotenv
 
+from paperless.settings.custom import parse_beat_schedule
+from paperless.settings.custom import parse_dateparser_languages
 from paperless.settings.custom import parse_db_settings
+from paperless.settings.custom import parse_hosting_settings
+from paperless.settings.custom import parse_ignore_dates
+from paperless.settings.custom import parse_redis_url
+from paperless.settings.parsers import get_bool_from_env
+from paperless.settings.parsers import get_float_from_env
+from paperless.settings.parsers import get_int_from_env
+from paperless.settings.parsers import get_list_from_env
+from paperless.settings.parsers import get_path_from_env
 
 logger = logging.getLogger("paperless.settings")
 
@@ -45,239 +52,8 @@ for path in [
 os.environ["OMP_THREAD_LIMIT"] = "1"
 
 
-def __get_boolean(key: str, default: str = "NO") -> bool:
-    """
-    Return a boolean value based on whatever the user has supplied in the
-    environment based on whether the value "looks like" it's True or not.
-    """
-    return bool(os.getenv(key, default).lower() in ("yes", "y", "1", "t", "true"))
-
-
-def __get_int(key: str, default: int) -> int:
-    """
-    Return an integer value based on the environment variable or a default
-    """
-    return int(os.getenv(key, default))
-
-
-def __get_optional_int(key: str) -> int | None:
-    """
-    Returns None if the environment key is not present, otherwise an integer
-    """
-    if key in os.environ:
-        return __get_int(key, -1)  # pragma: no cover
-    return None
-
-
-def __get_float(key: str, default: float) -> float:
-    """
-    Return an integer value based on the environment variable or a default
-    """
-    return float(os.getenv(key, default))
-
-
-def __get_path(
-    key: str,
-    default: PathLike | str,
-) -> Path:
-    """
-    Return a normalized, absolute path based on the environment variable or a default,
-    if provided
-    """
-    if key in os.environ:
-        return Path(os.environ[key]).resolve()
-    return Path(default).resolve()
-
-
-def __get_optional_path(key: str) -> Path | None:
-    """
-    Returns None if the environment key is not present, otherwise a fully resolved Path
-    """
-    if key in os.environ:
-        return __get_path(key, "")
-    return None
-
-
-def __get_list(
-    key: str,
-    default: list[str] | None = None,
-    sep: str = ",",
-) -> list[str]:
-    """
-    Return a list of elements from the environment, as separated by the given
-    string, or the default if the key does not exist
-    """
-    if key in os.environ:
-        return list(filter(None, os.environ[key].split(sep)))
-    elif default is not None:
-        return default
-    else:
-        return []
-
-
-def _parse_redis_url(env_redis: str | None) -> tuple[str, str]:
-    """
-    Gets the Redis information from the environment or a default and handles
-    converting from incompatible django_channels and celery formats.
-
-    Returns a tuple of (celery_url, channels_url)
-    """
-
-    # Not set, return a compatible default
-    if env_redis is None:
-        return ("redis://localhost:6379", "redis://localhost:6379")
-
-    if "unix" in env_redis.lower():
-        # channels_redis socket format, looks like:
-        # "unix:///path/to/redis.sock"
-        _, path = env_redis.split(":", 1)
-        # Optionally setting a db number
-        if "?db=" in env_redis:
-            path, number = path.split("?db=")
-            return (f"redis+socket:{path}?virtual_host={number}", env_redis)
-        else:
-            return (f"redis+socket:{path}", env_redis)
-
-    elif "+socket" in env_redis.lower():
-        # celery socket style, looks like:
-        # "redis+socket:///path/to/redis.sock"
-        _, path = env_redis.split(":", 1)
-        if "?virtual_host=" in env_redis:
-            # Virtual host (aka db number)
-            path, number = path.split("?virtual_host=")
-            return (env_redis, f"unix:{path}?db={number}")
-        else:
-            return (env_redis, f"unix:{path}")
-
-    # Not a socket
-    return (env_redis, env_redis)
-
-
-def _parse_beat_schedule() -> dict:
-    """
-    Configures the scheduled tasks, according to default or
-    environment variables.  Task expiration is configured so the task will
-    expire (and not run), shortly before the default frequency will put another
-    of the same task into the queue
-
-
-    https://docs.celeryq.dev/en/stable/userguide/periodic-tasks.html#beat-entries
-    https://docs.celeryq.dev/en/latest/userguide/calling.html#expiration
-    """
-    schedule = {}
-    tasks = [
-        {
-            "name": "Check all e-mail accounts",
-            "env_key": "PAPERLESS_EMAIL_TASK_CRON",
-            # Default every ten minutes
-            "env_default": "*/10 * * * *",
-            "task": "paperless_mail.tasks.process_mail_accounts",
-            "options": {
-                # 1 minute before default schedule sends again
-                "expires": 9.0 * 60.0,
-            },
-        },
-        {
-            "name": "Train the classifier",
-            "env_key": "PAPERLESS_TRAIN_TASK_CRON",
-            # Default hourly at 5 minutes past the hour
-            "env_default": "5 */1 * * *",
-            "task": "documents.tasks.train_classifier",
-            "options": {
-                # 1 minute before default schedule sends again
-                "expires": 59.0 * 60.0,
-            },
-        },
-        {
-            "name": "Optimize the index",
-            "env_key": "PAPERLESS_INDEX_TASK_CRON",
-            # Default daily at midnight
-            "env_default": "0 0 * * *",
-            "task": "documents.tasks.index_optimize",
-            "options": {
-                # 1 hour before default schedule sends again
-                "expires": 23.0 * 60.0 * 60.0,
-            },
-        },
-        {
-            "name": "Perform sanity check",
-            "env_key": "PAPERLESS_SANITY_TASK_CRON",
-            # Default Sunday at 00:30
-            "env_default": "30 0 * * sun",
-            "task": "documents.tasks.sanity_check",
-            "options": {
-                # 1 hour before default schedule sends again
-                "expires": ((7.0 * 24.0) - 1.0) * 60.0 * 60.0,
-            },
-        },
-        {
-            "name": "Empty trash",
-            "env_key": "PAPERLESS_EMPTY_TRASH_TASK_CRON",
-            # Default daily at 01:00
-            "env_default": "0 1 * * *",
-            "task": "documents.tasks.empty_trash",
-            "options": {
-                # 1 hour before default schedule sends again
-                "expires": 23.0 * 60.0 * 60.0,
-            },
-        },
-        {
-            "name": "Check and run scheduled workflows",
-            "env_key": "PAPERLESS_WORKFLOW_SCHEDULED_TASK_CRON",
-            # Default hourly at 5 minutes past the hour
-            "env_default": "5 */1 * * *",
-            "task": "documents.tasks.check_scheduled_workflows",
-            "options": {
-                # 1 minute before default schedule sends again
-                "expires": 59.0 * 60.0,
-            },
-        },
-        {
-            "name": "Rebuild LLM index",
-            "env_key": "PAPERLESS_LLM_INDEX_TASK_CRON",
-            # Default daily at 02:10
-            "env_default": "10 2 * * *",
-            "task": "documents.tasks.llmindex_index",
-            "options": {
-                # 1 hour before default schedule sends again
-                "expires": 23.0 * 60.0 * 60.0,
-            },
-        },
-        {
-            "name": "Cleanup expired share link bundles",
-            "env_key": "PAPERLESS_SHARE_LINK_BUNDLE_CLEANUP_CRON",
-            # Default daily at 02:00
-            "env_default": "0 2 * * *",
-            "task": "documents.tasks.cleanup_expired_share_link_bundles",
-            "options": {
-                # 1 hour before default schedule sends again
-                "expires": 23.0 * 60.0 * 60.0,
-            },
-        },
-    ]
-    for task in tasks:
-        # Either get the environment setting or use the default
-        value = os.getenv(task["env_key"], task["env_default"])
-        # Don't add disabled tasks to the schedule
-        if value == "disable":
-            continue
-        # I find https://crontab.guru/ super helpful
-        # crontab(5) format
-        #   - five time-and-date fields
-        #   - separated by at least one blank
-        minute, hour, day_month, month, day_week = value.split(" ")
-
-        schedule[task["name"]] = {
-            "task": task["task"],
-            "schedule": crontab(minute, hour, day_week, day_month, month),
-            "options": task["options"],
-        }
-
-    return schedule
-
-
 # NEVER RUN WITH DEBUG IN PRODUCTION.
-DEBUG = __get_boolean("PAPERLESS_DEBUG", "NO")
+DEBUG = get_bool_from_env("PAPERLESS_DEBUG", "NO")
 
 
 ###############################################################################
@@ -286,21 +62,21 @@ DEBUG = __get_boolean("PAPERLESS_DEBUG", "NO")
 
 BASE_DIR: Path = Path(__file__).resolve().parent.parent.parent
 
-STATIC_ROOT = __get_path("PAPERLESS_STATICDIR", BASE_DIR.parent / "static")
+STATIC_ROOT = get_path_from_env("PAPERLESS_STATICDIR", BASE_DIR.parent / "static")
 
-MEDIA_ROOT = __get_path("PAPERLESS_MEDIA_ROOT", BASE_DIR.parent / "media")
+MEDIA_ROOT = get_path_from_env("PAPERLESS_MEDIA_ROOT", BASE_DIR.parent / "media")
 ORIGINALS_DIR = MEDIA_ROOT / "documents" / "originals"
 ARCHIVE_DIR = MEDIA_ROOT / "documents" / "archive"
 THUMBNAIL_DIR = MEDIA_ROOT / "documents" / "thumbnails"
 SHARE_LINK_BUNDLE_DIR = MEDIA_ROOT / "documents" / "share_link_bundles"
 
-DATA_DIR = __get_path("PAPERLESS_DATA_DIR", BASE_DIR.parent / "data")
+DATA_DIR = get_path_from_env("PAPERLESS_DATA_DIR", BASE_DIR.parent / "data")
 
-NLTK_DIR = __get_path("PAPERLESS_NLTK_DIR", "/usr/share/nltk_data")
+NLTK_DIR = get_path_from_env("PAPERLESS_NLTK_DIR", "/usr/share/nltk_data")
 
 # Check deprecated setting first
 EMPTY_TRASH_DIR = (
-    __get_path("PAPERLESS_TRASH_DIR", os.getenv("PAPERLESS_EMPTY_TRASH_DIR"))
+    get_path_from_env("PAPERLESS_TRASH_DIR", os.getenv("PAPERLESS_EMPTY_TRASH_DIR"))
     if os.getenv("PAPERLESS_TRASH_DIR") or os.getenv("PAPERLESS_EMPTY_TRASH_DIR")
     else None
 )
@@ -309,21 +85,21 @@ EMPTY_TRASH_DIR = (
 # threads.
 MEDIA_LOCK = MEDIA_ROOT / "media.lock"
 INDEX_DIR = DATA_DIR / "index"
-MODEL_FILE = __get_path(
+MODEL_FILE = get_path_from_env(
     "PAPERLESS_MODEL_FILE",
     DATA_DIR / "classification_model.pickle",
 )
 LLM_INDEX_DIR = DATA_DIR / "llm_index"
 
-LOGGING_DIR = __get_path("PAPERLESS_LOGGING_DIR", DATA_DIR / "log")
+LOGGING_DIR = get_path_from_env("PAPERLESS_LOGGING_DIR", DATA_DIR / "log")
 
-CONSUMPTION_DIR = __get_path(
+CONSUMPTION_DIR = get_path_from_env(
     "PAPERLESS_CONSUMPTION_DIR",
     BASE_DIR.parent / "consume",
 )
 
 # This will be created if it doesn't exist
-SCRATCH_DIR = __get_path(
+SCRATCH_DIR = get_path_from_env(
     "PAPERLESS_SCRATCH_DIR",
     Path(tempfile.gettempdir()) / "paperless",
 )
@@ -332,7 +108,7 @@ SCRATCH_DIR = __get_path(
 # Application Definition                                                      #
 ###############################################################################
 
-env_apps = __get_list("PAPERLESS_APPS")
+env_apps = get_list_from_env("PAPERLESS_APPS")
 
 INSTALLED_APPS = [
     "whitenoise.runserver_nostatic",
@@ -405,7 +181,7 @@ MIDDLEWARE = [
 ]
 
 # Optional to enable compression
-if __get_boolean("PAPERLESS_ENABLE_COMPRESSION", "yes"):  # pragma: no cover
+if get_bool_from_env("PAPERLESS_ENABLE_COMPRESSION", "yes"):  # pragma: no cover
     MIDDLEWARE.insert(0, "compression_middleware.middleware.CompressionMiddleware")
 
 # Workaround to not compress streaming responses (e.g. chat).
@@ -424,20 +200,8 @@ CompressionMiddleware.process_response = patched_process_response
 ROOT_URLCONF = "paperless.urls"
 
 
-def _parse_base_paths() -> tuple[str, str, str, str, str]:
-    script_name = os.getenv("PAPERLESS_FORCE_SCRIPT_NAME")
-    base_url = (script_name or "") + "/"
-    login_url = base_url + "accounts/login/"
-    login_redirect_url = base_url + "dashboard"
-    logout_redirect_url = os.getenv(
-        "PAPERLESS_LOGOUT_REDIRECT_URL",
-        login_url + "?loggedout=1",
-    )
-    return script_name, base_url, login_url, login_redirect_url, logout_redirect_url
-
-
 FORCE_SCRIPT_NAME, BASE_URL, LOGIN_URL, LOGIN_REDIRECT_URL, LOGOUT_REDIRECT_URL = (
-    _parse_base_paths()
+    parse_hosting_settings()
 )
 
 # DRF Spectacular settings
@@ -471,7 +235,7 @@ STORAGES = {
     "default": {"BACKEND": "django.core.files.storage.FileSystemStorage"},
 }
 
-_CELERY_REDIS_URL, _CHANNELS_REDIS_URL = _parse_redis_url(
+_CELERY_REDIS_URL, _CHANNELS_REDIS_URL = parse_redis_url(
     os.getenv("PAPERLESS_REDIS", None),
 )
 _REDIS_KEY_PREFIX = os.getenv("PAPERLESS_REDIS_PREFIX", "")
@@ -520,8 +284,8 @@ EMAIL_PORT: Final[int] = int(os.getenv("PAPERLESS_EMAIL_PORT", 25))
 EMAIL_HOST_USER: Final[str] = os.getenv("PAPERLESS_EMAIL_HOST_USER", "")
 EMAIL_HOST_PASSWORD: Final[str] = os.getenv("PAPERLESS_EMAIL_HOST_PASSWORD", "")
 DEFAULT_FROM_EMAIL: Final[str] = os.getenv("PAPERLESS_EMAIL_FROM", EMAIL_HOST_USER)
-EMAIL_USE_TLS: Final[bool] = __get_boolean("PAPERLESS_EMAIL_USE_TLS")
+EMAIL_USE_TLS: Final[bool] = get_bool_from_env("PAPERLESS_EMAIL_USE_TLS")
-EMAIL_USE_SSL: Final[bool] = __get_boolean("PAPERLESS_EMAIL_USE_SSL")
+EMAIL_USE_SSL: Final[bool] = get_bool_from_env("PAPERLESS_EMAIL_USE_SSL")
 EMAIL_SUBJECT_PREFIX: Final[str] = "[Paperless-ngx] "
 EMAIL_TIMEOUT = 30.0
 EMAIL_ENABLED = EMAIL_HOST != "localhost" or EMAIL_HOST_USER != ""
@@ -546,20 +310,22 @@ ACCOUNT_DEFAULT_HTTP_PROTOCOL = os.getenv(
 )
 
 ACCOUNT_ADAPTER = "paperless.adapter.CustomAccountAdapter"
-ACCOUNT_ALLOW_SIGNUPS = __get_boolean("PAPERLESS_ACCOUNT_ALLOW_SIGNUPS")
+ACCOUNT_ALLOW_SIGNUPS = get_bool_from_env("PAPERLESS_ACCOUNT_ALLOW_SIGNUPS")
-ACCOUNT_DEFAULT_GROUPS = __get_list("PAPERLESS_ACCOUNT_DEFAULT_GROUPS")
+ACCOUNT_DEFAULT_GROUPS = get_list_from_env("PAPERLESS_ACCOUNT_DEFAULT_GROUPS")
 
 SOCIALACCOUNT_ADAPTER = "paperless.adapter.CustomSocialAccountAdapter"
-SOCIALACCOUNT_ALLOW_SIGNUPS = __get_boolean(
+SOCIALACCOUNT_ALLOW_SIGNUPS = get_bool_from_env(
     "PAPERLESS_SOCIALACCOUNT_ALLOW_SIGNUPS",
     "yes",
 )
-SOCIALACCOUNT_AUTO_SIGNUP = __get_boolean("PAPERLESS_SOCIAL_AUTO_SIGNUP")
+SOCIALACCOUNT_AUTO_SIGNUP = get_bool_from_env("PAPERLESS_SOCIAL_AUTO_SIGNUP")
 SOCIALACCOUNT_PROVIDERS = json.loads(
     os.getenv("PAPERLESS_SOCIALACCOUNT_PROVIDERS", "{}"),
 )
-SOCIAL_ACCOUNT_DEFAULT_GROUPS = __get_list("PAPERLESS_SOCIAL_ACCOUNT_DEFAULT_GROUPS")
+SOCIAL_ACCOUNT_DEFAULT_GROUPS = get_list_from_env(
-SOCIAL_ACCOUNT_SYNC_GROUPS = __get_boolean("PAPERLESS_SOCIAL_ACCOUNT_SYNC_GROUPS")
+    "PAPERLESS_SOCIAL_ACCOUNT_DEFAULT_GROUPS",
+)
+SOCIAL_ACCOUNT_SYNC_GROUPS = get_bool_from_env("PAPERLESS_SOCIAL_ACCOUNT_SYNC_GROUPS")
 SOCIAL_ACCOUNT_SYNC_GROUPS_CLAIM: Final[str] = os.getenv(
     "PAPERLESS_SOCIAL_ACCOUNT_SYNC_GROUPS_CLAIM",
     "groups",
@@ -571,8 +337,8 @@ MFA_TOTP_ISSUER = "Paperless-ngx"
 
 ACCOUNT_EMAIL_SUBJECT_PREFIX = "[Paperless-ngx] "
 
-DISABLE_REGULAR_LOGIN = __get_boolean("PAPERLESS_DISABLE_REGULAR_LOGIN")
+DISABLE_REGULAR_LOGIN = get_bool_from_env("PAPERLESS_DISABLE_REGULAR_LOGIN")
-REDIRECT_LOGIN_TO_SSO = __get_boolean("PAPERLESS_REDIRECT_LOGIN_TO_SSO")
+REDIRECT_LOGIN_TO_SSO = get_bool_from_env("PAPERLESS_REDIRECT_LOGIN_TO_SSO")
 
 AUTO_LOGIN_USERNAME = os.getenv("PAPERLESS_AUTO_LOGIN_USERNAME")
 
@@ -585,12 +351,15 @@ ACCOUNT_EMAIL_VERIFICATION = (
     )
 )
 
-ACCOUNT_EMAIL_UNKNOWN_ACCOUNTS = __get_boolean(
+ACCOUNT_EMAIL_UNKNOWN_ACCOUNTS = get_bool_from_env(
     "PAPERLESS_ACCOUNT_EMAIL_UNKNOWN_ACCOUNTS",
     "True",
 )
 
-ACCOUNT_SESSION_REMEMBER = __get_boolean("PAPERLESS_ACCOUNT_SESSION_REMEMBER", "True")
+ACCOUNT_SESSION_REMEMBER = get_bool_from_env(
+    "PAPERLESS_ACCOUNT_SESSION_REMEMBER",
+    "True",
+)
 SESSION_EXPIRE_AT_BROWSER_CLOSE = not ACCOUNT_SESSION_REMEMBER
 SESSION_COOKIE_AGE = int(
     os.getenv("PAPERLESS_SESSION_COOKIE_AGE", 60 * 60 * 24 * 7 * 3),
@@ -607,8 +376,8 @@ if AUTO_LOGIN_USERNAME:
 
 def _parse_remote_user_settings() -> str:
     global MIDDLEWARE, AUTHENTICATION_BACKENDS, REST_FRAMEWORK
-    enable = __get_boolean("PAPERLESS_ENABLE_HTTP_REMOTE_USER")
+    enable = get_bool_from_env("PAPERLESS_ENABLE_HTTP_REMOTE_USER")
-    enable_api = __get_boolean("PAPERLESS_ENABLE_HTTP_REMOTE_USER_API")
+    enable_api = get_bool_from_env("PAPERLESS_ENABLE_HTTP_REMOTE_USER_API")
     if enable or enable_api:
         MIDDLEWARE.append("paperless.auth.HttpRemoteUserMiddleware")
         AUTHENTICATION_BACKENDS.insert(
@@ -636,16 +405,16 @@ HTTP_REMOTE_USER_HEADER_NAME = _parse_remote_user_settings()
 X_FRAME_OPTIONS = "SAMEORIGIN"
 
 # The next 3 settings can also be set using just PAPERLESS_URL
-CSRF_TRUSTED_ORIGINS = __get_list("PAPERLESS_CSRF_TRUSTED_ORIGINS")
+CSRF_TRUSTED_ORIGINS = get_list_from_env("PAPERLESS_CSRF_TRUSTED_ORIGINS")
 
 if DEBUG:
     # Allow access from the angular development server during debugging
     CSRF_TRUSTED_ORIGINS.append("http://localhost:4200")
 
 # We allow CORS from localhost:8000
-CORS_ALLOWED_ORIGINS = __get_list(
+CORS_ALLOWED_ORIGINS = get_list_from_env(
     "PAPERLESS_CORS_ALLOWED_HOSTS",
-    ["http://localhost:8000"],
+    default=["http://localhost:8000"],
 )
 
 if DEBUG:
@@ -658,7 +427,7 @@ CORS_EXPOSE_HEADERS = [
     "Content-Disposition",
 ]
 
-ALLOWED_HOSTS = __get_list("PAPERLESS_ALLOWED_HOSTS", ["*"])
+ALLOWED_HOSTS = get_list_from_env("PAPERLESS_ALLOWED_HOSTS", default=["*"])
 if ALLOWED_HOSTS != ["*"]:
     # always allow localhost. Necessary e.g. for healthcheck in docker.
     ALLOWED_HOSTS.append("localhost")
@@ -678,10 +447,10 @@ def _parse_paperless_url():
 PAPERLESS_URL = _parse_paperless_url()
 
 # For use with trusted proxies
-TRUSTED_PROXIES = __get_list("PAPERLESS_TRUSTED_PROXIES")
+TRUSTED_PROXIES = get_list_from_env("PAPERLESS_TRUSTED_PROXIES")
 
-USE_X_FORWARDED_HOST = __get_boolean("PAPERLESS_USE_X_FORWARD_HOST", "false")
+USE_X_FORWARDED_HOST = get_bool_from_env("PAPERLESS_USE_X_FORWARD_HOST", "false")
-USE_X_FORWARDED_PORT = __get_boolean("PAPERLESS_USE_X_FORWARD_PORT", "false")
+USE_X_FORWARDED_PORT = get_bool_from_env("PAPERLESS_USE_X_FORWARD_PORT", "false")
 SECURE_PROXY_SSL_HEADER = (
     tuple(json.loads(os.environ["PAPERLESS_PROXY_SSL_HEADER"]))
     if "PAPERLESS_PROXY_SSL_HEADER" in os.environ
@@ -724,7 +493,7 @@ CSRF_COOKIE_NAME = f"{COOKIE_PREFIX}csrftoken"
 SESSION_COOKIE_NAME = f"{COOKIE_PREFIX}sessionid"
 LANGUAGE_COOKIE_NAME = f"{COOKIE_PREFIX}django_language"
 
-EMAIL_CERTIFICATE_FILE = __get_optional_path("PAPERLESS_EMAIL_CERTIFICATE_LOCATION")
+EMAIL_CERTIFICATE_FILE = get_path_from_env("PAPERLESS_EMAIL_CERTIFICATE_LOCATION")
 
 
 ###############################################################################
@@ -875,7 +644,7 @@ CELERY_BROKER_URL = _CELERY_REDIS_URL
 CELERY_TIMEZONE = TIME_ZONE
 
 CELERY_WORKER_HIJACK_ROOT_LOGGER = False
-CELERY_WORKER_CONCURRENCY: Final[int] = __get_int("PAPERLESS_TASK_WORKERS", 1)
+CELERY_WORKER_CONCURRENCY: Final[int] = get_int_from_env("PAPERLESS_TASK_WORKERS", 1)
 TASK_WORKERS = CELERY_WORKER_CONCURRENCY
 CELERY_WORKER_MAX_TASKS_PER_CHILD = 1
 CELERY_WORKER_SEND_TASK_EVENTS = True
@@ -888,7 +657,7 @@ CELERY_BROKER_TRANSPORT_OPTIONS = {
 }
 
 CELERY_TASK_TRACK_STARTED = True
-CELERY_TASK_TIME_LIMIT: Final[int] = __get_int("PAPERLESS_WORKER_TIMEOUT", 1800)
+CELERY_TASK_TIME_LIMIT: Final[int] = get_int_from_env("PAPERLESS_WORKER_TIMEOUT", 1800)
 
 CELERY_RESULT_EXTENDED = True
 CELERY_RESULT_BACKEND = "django-db"
@@ -900,7 +669,7 @@ CELERY_TASK_SERIALIZER = "pickle"
 CELERY_ACCEPT_CONTENT = ["application/json", "application/x-python-serialize"]
 
 # https://docs.celeryq.dev/en/stable/userguide/configuration.html#beat-schedule
-CELERY_BEAT_SCHEDULE = _parse_beat_schedule()
+CELERY_BEAT_SCHEDULE = parse_beat_schedule()
 
 # https://docs.celeryq.dev/en/stable/userguide/configuration.html#beat-schedule-filename
 CELERY_BEAT_SCHEDULE_FILENAME = str(DATA_DIR / "celerybeat-schedule.db")
@@ -908,14 +677,14 @@ CELERY_BEAT_SCHEDULE_FILENAME = str(DATA_DIR / "celerybeat-schedule.db")
 
 # Cachalot: Database read cache.
 def _parse_cachalot_settings():
-    ttl = __get_int("PAPERLESS_READ_CACHE_TTL", 3600)
+    ttl = get_int_from_env("PAPERLESS_READ_CACHE_TTL", 3600)
     ttl = min(ttl, 31536000) if ttl > 0 else 3600
-    _, redis_url = _parse_redis_url(
+    _, redis_url = parse_redis_url(
         os.getenv("PAPERLESS_READ_CACHE_REDIS_URL", _CHANNELS_REDIS_URL),
     )
     result = {
         "CACHALOT_CACHE": "read-cache",
-        "CACHALOT_ENABLED": __get_boolean(
+        "CACHALOT_ENABLED": get_bool_from_env(
             "PAPERLESS_DB_READ_CACHE_ENABLED",
             default="no",
         ),
@@ -1000,9 +769,9 @@ CONSUMER_POLLING_INTERVAL = float(os.getenv("PAPERLESS_CONSUMER_POLLING_INTERVAL
 
 CONSUMER_STABILITY_DELAY = float(os.getenv("PAPERLESS_CONSUMER_STABILITY_DELAY", 5))
 
-CONSUMER_DELETE_DUPLICATES = __get_boolean("PAPERLESS_CONSUMER_DELETE_DUPLICATES")
+CONSUMER_DELETE_DUPLICATES = get_bool_from_env("PAPERLESS_CONSUMER_DELETE_DUPLICATES")
 
-CONSUMER_RECURSIVE = __get_boolean("PAPERLESS_CONSUMER_RECURSIVE")
+CONSUMER_RECURSIVE = get_bool_from_env("PAPERLESS_CONSUMER_RECURSIVE")
 
 # Ignore regex patterns, matched against filename only
 CONSUMER_IGNORE_PATTERNS = list(
@@ -1024,13 +793,13 @@ CONSUMER_IGNORE_DIRS = list(
     ),
 )
 
-CONSUMER_SUBDIRS_AS_TAGS = __get_boolean("PAPERLESS_CONSUMER_SUBDIRS_AS_TAGS")
+CONSUMER_SUBDIRS_AS_TAGS = get_bool_from_env("PAPERLESS_CONSUMER_SUBDIRS_AS_TAGS")
 
-CONSUMER_ENABLE_BARCODES: Final[bool] = __get_boolean(
+CONSUMER_ENABLE_BARCODES: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_ENABLE_BARCODES",
 )
 
-CONSUMER_BARCODE_TIFF_SUPPORT: Final[bool] = __get_boolean(
+CONSUMER_BARCODE_TIFF_SUPPORT: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_BARCODE_TIFF_SUPPORT",
 )
 
@@ -1039,7 +808,7 @@ CONSUMER_BARCODE_STRING: Final[str] = os.getenv(
     "PATCHT",
 )
 
-CONSUMER_ENABLE_ASN_BARCODE: Final[bool] = __get_boolean(
+CONSUMER_ENABLE_ASN_BARCODE: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_ENABLE_ASN_BARCODE",
 )
 
@@ -1048,23 +817,26 @@ CONSUMER_ASN_BARCODE_PREFIX: Final[str] = os.getenv(
     "ASN",
 )
 
-CONSUMER_BARCODE_UPSCALE: Final[float] = __get_float(
+CONSUMER_BARCODE_UPSCALE: Final[float] = get_float_from_env(
     "PAPERLESS_CONSUMER_BARCODE_UPSCALE",
     0.0,
 )
 
-CONSUMER_BARCODE_DPI: Final[int] = __get_int("PAPERLESS_CONSUMER_BARCODE_DPI", 300)
+CONSUMER_BARCODE_DPI: Final[int] = get_int_from_env(
+    "PAPERLESS_CONSUMER_BARCODE_DPI",
+    300,
+)
 
-CONSUMER_BARCODE_MAX_PAGES: Final[int] = __get_int(
+CONSUMER_BARCODE_MAX_PAGES: Final[int] = get_int_from_env(
     "PAPERLESS_CONSUMER_BARCODE_MAX_PAGES",
     0,
 )
 
-CONSUMER_BARCODE_RETAIN_SPLIT_PAGES = __get_boolean(
+CONSUMER_BARCODE_RETAIN_SPLIT_PAGES = get_bool_from_env(
     "PAPERLESS_CONSUMER_BARCODE_RETAIN_SPLIT_PAGES",
 )
 
-CONSUMER_ENABLE_TAG_BARCODE: Final[bool] = __get_boolean(
+CONSUMER_ENABLE_TAG_BARCODE: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_ENABLE_TAG_BARCODE",
 )
 
@@ -1077,11 +849,11 @@ CONSUMER_TAG_BARCODE_MAPPING = dict(
     ),
 )
 
-CONSUMER_TAG_BARCODE_SPLIT: Final[bool] = __get_boolean(
+CONSUMER_TAG_BARCODE_SPLIT: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_TAG_BARCODE_SPLIT",
 )
 
-CONSUMER_ENABLE_COLLATE_DOUBLE_SIDED: Final[bool] = __get_boolean(
+CONSUMER_ENABLE_COLLATE_DOUBLE_SIDED: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_ENABLE_COLLATE_DOUBLE_SIDED",
 )
 
@@ -1090,13 +862,13 @@ CONSUMER_COLLATE_DOUBLE_SIDED_SUBDIR_NAME: Final[str] = os.getenv(
     "double-sided",
 )
 
-CONSUMER_COLLATE_DOUBLE_SIDED_TIFF_SUPPORT: Final[bool] = __get_boolean(
+CONSUMER_COLLATE_DOUBLE_SIDED_TIFF_SUPPORT: Final[bool] = get_bool_from_env(
     "PAPERLESS_CONSUMER_COLLATE_DOUBLE_SIDED_TIFF_SUPPORT",
 )
 
 CONSUMER_PDF_RECOVERABLE_MIME_TYPES = ("application/octet-stream",)
 
-OCR_PAGES = __get_optional_int("PAPERLESS_OCR_PAGES")
+OCR_PAGES = get_int_from_env("PAPERLESS_OCR_PAGES")
 
 # The default language that tesseract will attempt to use when parsing
 # documents.  It should be a 3-letter language code consistent with ISO 639.
@@ -1110,20 +882,20 @@ OCR_MODE = os.getenv("PAPERLESS_OCR_MODE", "skip")
 
 OCR_SKIP_ARCHIVE_FILE = os.getenv("PAPERLESS_OCR_SKIP_ARCHIVE_FILE", "never")
 
-OCR_IMAGE_DPI = __get_optional_int("PAPERLESS_OCR_IMAGE_DPI")
+OCR_IMAGE_DPI = get_int_from_env("PAPERLESS_OCR_IMAGE_DPI")
 
 OCR_CLEAN = os.getenv("PAPERLESS_OCR_CLEAN", "clean")
 
-OCR_DESKEW: Final[bool] = __get_boolean("PAPERLESS_OCR_DESKEW", "true")
+OCR_DESKEW: Final[bool] = get_bool_from_env("PAPERLESS_OCR_DESKEW", "true")
 
-OCR_ROTATE_PAGES: Final[bool] = __get_boolean("PAPERLESS_OCR_ROTATE_PAGES", "true")
+OCR_ROTATE_PAGES: Final[bool] = get_bool_from_env("PAPERLESS_OCR_ROTATE_PAGES", "true")
 
-OCR_ROTATE_PAGES_THRESHOLD: Final[float] = __get_float(
+OCR_ROTATE_PAGES_THRESHOLD: Final[float] = get_float_from_env(
     "PAPERLESS_OCR_ROTATE_PAGES_THRESHOLD",
     12.0,
 )
 
-OCR_MAX_IMAGE_PIXELS: Final[int | None] = __get_optional_int(
+OCR_MAX_IMAGE_PIXELS: Final[int | None] = get_int_from_env(
     "PAPERLESS_OCR_MAX_IMAGE_PIXELS",
 )
 
@@ -1134,7 +906,7 @@ OCR_COLOR_CONVERSION_STRATEGY = os.getenv(
 
 OCR_USER_ARGS = os.getenv("PAPERLESS_OCR_USER_ARGS")
 
-MAX_IMAGE_PIXELS: Final[int | None] = __get_optional_int(
+MAX_IMAGE_PIXELS: Final[int | None] = get_int_from_env(
     "PAPERLESS_MAX_IMAGE_PIXELS",
 )
 
@@ -1149,7 +921,7 @@ CONVERT_MEMORY_LIMIT = os.getenv("PAPERLESS_CONVERT_MEMORY_LIMIT")
 GS_BINARY = os.getenv("PAPERLESS_GS_BINARY", "gs")
 
 # Fallback layout for .eml consumption
-EMAIL_PARSE_DEFAULT_LAYOUT = __get_int(
+EMAIL_PARSE_DEFAULT_LAYOUT = get_int_from_env(
     "PAPERLESS_EMAIL_PARSE_DEFAULT_LAYOUT",
     1,  # MailRule.PdfLayout.TEXT_HTML but that can't be imported here
 )
@@ -1163,23 +935,9 @@ DATE_ORDER = os.getenv("PAPERLESS_DATE_ORDER", "DMY")
 FILENAME_DATE_ORDER = os.getenv("PAPERLESS_FILENAME_DATE_ORDER")
 
 
-def _parse_dateparser_languages(languages: str | None):
-    language_list = languages.split("+") if languages else []
-    # There is an unfixed issue in zh-Hant and zh-Hans locales in the dateparser lib.
-    # See: https://github.com/scrapinghub/dateparser/issues/875
-    for index, language in enumerate(language_list):
-        if language.startswith("zh-") and "zh" not in language_list:
-            logger.warning(
-                f'Chinese locale detected: {language}. dateparser might fail to parse some dates with this locale, so Chinese ("zh") will be used as a fallback.',
-            )
-            language_list.append("zh")
-
-    return list(LocaleDataLoader().get_locale_map(locales=language_list))
-
-
 # If not set, we will infer it at runtime
 DATE_PARSER_LANGUAGES = (
-    _parse_dateparser_languages(
+    parse_dateparser_languages(
         os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES"),
     )
     if os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES")
@@ -1190,7 +948,7 @@ DATE_PARSER_LANGUAGES = (
 # Maximum number of dates taken from document start to end to show as suggestions for
 # `created` date in the frontend. Duplicates are removed, which can result in
 # fewer dates shown.
-NUMBER_OF_SUGGESTED_DATES = __get_int("PAPERLESS_NUMBER_OF_SUGGESTED_DATES", 3)
+NUMBER_OF_SUGGESTED_DATES = get_int_from_env("PAPERLESS_NUMBER_OF_SUGGESTED_DATES", 3)
 
 # Specify the filename format for out files
 FILENAME_FORMAT = os.getenv("PAPERLESS_FILENAME_FORMAT")
@@ -1198,7 +956,7 @@ FILENAME_FORMAT = os.getenv("PAPERLESS_FILENAME_FORMAT")
 # If this is enabled, variables in filename format will resolve to
 # empty-string instead of 'none'.
 # Directories with 'empty names' are omitted, too.
-FILENAME_FORMAT_REMOVE_NONE = __get_boolean(
+FILENAME_FORMAT_REMOVE_NONE = get_bool_from_env(
     "PAPERLESS_FILENAME_FORMAT_REMOVE_NONE",
     "NO",
 )
@@ -1209,7 +967,7 @@ THUMBNAIL_FONT_NAME = os.getenv(
 )
 
 # Tika settings
-TIKA_ENABLED = __get_boolean("PAPERLESS_TIKA_ENABLED", "NO")
+TIKA_ENABLED = get_bool_from_env("PAPERLESS_TIKA_ENABLED", "NO")
 TIKA_ENDPOINT = os.getenv("PAPERLESS_TIKA_ENDPOINT", "http://localhost:9998")
 TIKA_GOTENBERG_ENDPOINT = os.getenv(
     "PAPERLESS_TIKA_GOTENBERG_ENDPOINT",
@@ -1219,52 +977,21 @@ TIKA_GOTENBERG_ENDPOINT = os.getenv(
 if TIKA_ENABLED:
     INSTALLED_APPS.append("paperless_tika.apps.PaperlessTikaConfig")
 
-AUDIT_LOG_ENABLED = __get_boolean("PAPERLESS_AUDIT_LOG_ENABLED", "true")
+AUDIT_LOG_ENABLED = get_bool_from_env("PAPERLESS_AUDIT_LOG_ENABLED", "true")
 if AUDIT_LOG_ENABLED:
     INSTALLED_APPS.append("auditlog")
     MIDDLEWARE.append("auditlog.middleware.AuditlogMiddleware")
 
 
-def _parse_ignore_dates(
-    env_ignore: str,
-    date_order: str = DATE_ORDER,
-) -> set[datetime.datetime]:
-    """
-    If the PAPERLESS_IGNORE_DATES environment variable is set, parse the
-    user provided string(s) into dates
-
-    Args:
-        env_ignore (str): The value of the environment variable, comma separated dates
-        date_order (str, optional): The format of the date strings.
-                                    Defaults to DATE_ORDER.
-
-    Returns:
-        Set[datetime.datetime]: The set of parsed date objects
-    """
-    import dateparser
-
-    ignored_dates = set()
-    for s in env_ignore.split(","):
-        d = dateparser.parse(
-            s,
-            settings={
-                "DATE_ORDER": date_order,
-            },
-        )
-        if d:
-            ignored_dates.add(d.date())
-    return ignored_dates
-
-
 # List dates that should be ignored when trying to parse date from document text
 IGNORE_DATES: set[datetime.date] = set()
 
 if os.getenv("PAPERLESS_IGNORE_DATES") is not None:
-    IGNORE_DATES = _parse_ignore_dates(os.getenv("PAPERLESS_IGNORE_DATES"))
+    IGNORE_DATES = parse_ignore_dates(os.getenv("PAPERLESS_IGNORE_DATES"), DATE_ORDER)
 
 ENABLE_UPDATE_CHECK = os.getenv("PAPERLESS_ENABLE_UPDATE_CHECK", "default")
 if ENABLE_UPDATE_CHECK != "default":
-    ENABLE_UPDATE_CHECK = __get_boolean("PAPERLESS_ENABLE_UPDATE_CHECK")
+    ENABLE_UPDATE_CHECK = get_bool_from_env("PAPERLESS_ENABLE_UPDATE_CHECK")
 
 APP_TITLE = os.getenv("PAPERLESS_APP_TITLE", None)
 APP_LOGO = os.getenv("PAPERLESS_APP_LOGO", None)
@@ -1309,7 +1036,7 @@ def _get_nltk_language_setting(ocr_lang: str) -> str | None:
     return iso_code_to_nltk.get(ocr_lang)
 
 
-NLTK_ENABLED: Final[bool] = __get_boolean("PAPERLESS_ENABLE_NLTK", "yes")
+NLTK_ENABLED: Final[bool] = get_bool_from_env("PAPERLESS_ENABLE_NLTK", "yes")
 
 NLTK_LANGUAGE: str | None = _get_nltk_language_setting(OCR_LANGUAGE)
 
@@ -1318,7 +1045,7 @@ NLTK_LANGUAGE: str | None = _get_nltk_language_setting(OCR_LANGUAGE)
 ###############################################################################
 
 EMAIL_GNUPG_HOME: Final[str | None] = os.getenv("PAPERLESS_EMAIL_GNUPG_HOME")
-EMAIL_ENABLE_GPG_DECRYPTOR: Final[bool] = __get_boolean(
+EMAIL_ENABLE_GPG_DECRYPTOR: Final[bool] = get_bool_from_env(
     "PAPERLESS_ENABLE_GPG_DECRYPTOR",
 )
 
@@ -1326,7 +1053,7 @@ EMAIL_ENABLE_GPG_DECRYPTOR: Final[bool] = __get_boolean(
 ###############################################################################
 # Soft Delete                                                                 #
 ###############################################################################
-EMPTY_TRASH_DELAY = max(__get_int("PAPERLESS_EMPTY_TRASH_DELAY", 30), 1)
+EMPTY_TRASH_DELAY = max(get_int_from_env("PAPERLESS_EMPTY_TRASH_DELAY", 30), 1)
 
 
 ###############################################################################
@@ -1351,21 +1078,17 @@ OUTLOOK_OAUTH_ENABLED = bool(
 ###############################################################################
 # Webhooks
 ###############################################################################
-WEBHOOKS_ALLOWED_SCHEMES = set(
+WEBHOOKS_ALLOWED_SCHEMES = {
     s.lower()
-    for s in __get_list(
+    for s in get_list_from_env(
         "PAPERLESS_WEBHOOKS_ALLOWED_SCHEMES",
-        ["http", "https"],
+        default=["http", "https"],
     )
-)
+}
-WEBHOOKS_ALLOWED_PORTS = set(
+WEBHOOKS_ALLOWED_PORTS = {
-    int(p)
+    int(p) for p in get_list_from_env("PAPERLESS_WEBHOOKS_ALLOWED_PORTS", default=[])
-    for p in __get_list(
+}
-        "PAPERLESS_WEBHOOKS_ALLOWED_PORTS",
+WEBHOOKS_ALLOW_INTERNAL_REQUESTS = get_bool_from_env(
-        [],
-    )
-)
-WEBHOOKS_ALLOW_INTERNAL_REQUESTS = __get_boolean(
     "PAPERLESS_WEBHOOKS_ALLOW_INTERNAL_REQUESTS",
     "true",
 )
@@ -1380,7 +1103,7 @@ REMOTE_OCR_ENDPOINT = os.getenv("PAPERLESS_REMOTE_OCR_ENDPOINT")
 ################################################################################
 # AI Settings                                                                  #
 ################################################################################
-AI_ENABLED = __get_boolean("PAPERLESS_AI_ENABLED", "NO")
+AI_ENABLED = get_bool_from_env("PAPERLESS_AI_ENABLED", "NO")
 LLM_EMBEDDING_BACKEND = os.getenv(
     "PAPERLESS_AI_LLM_EMBEDDING_BACKEND",
 )  # "huggingface" or "openai"

src/paperless/settings/custom.py

@@ -1,11 +1,191 @@
+import datetime
+import logging
 import os
 from pathlib import Path
 from typing import Any
 
+from celery.schedules import crontab
+from dateparser.languages.loader import LocaleDataLoader
+
 from paperless.settings.parsers import get_choice_from_env
 from paperless.settings.parsers import get_int_from_env
 from paperless.settings.parsers import parse_dict_from_str
 
+logger = logging.getLogger(__name__)
+
+
+def parse_hosting_settings() -> tuple[str | None, str, str, str, str]:
+    script_name = os.getenv("PAPERLESS_FORCE_SCRIPT_NAME")
+    base_url = (script_name or "") + "/"
+    login_url = base_url + "accounts/login/"
+    login_redirect_url = base_url + "dashboard"
+    logout_redirect_url = os.getenv(
+        "PAPERLESS_LOGOUT_REDIRECT_URL",
+        login_url + "?loggedout=1",
+    )
+    return script_name, base_url, login_url, login_redirect_url, logout_redirect_url
+
+
+def parse_redis_url(env_redis: str | None) -> tuple[str, str]:
+    """
+    Gets the Redis information from the environment or a default and handles
+    converting from incompatible django_channels and celery formats.
+
+    Returns a tuple of (celery_url, channels_url)
+    """
+
+    # Not set, return a compatible default
+    if env_redis is None:
+        return ("redis://localhost:6379", "redis://localhost:6379")
+
+    if "unix" in env_redis.lower():
+        # channels_redis socket format, looks like:
+        # "unix:///path/to/redis.sock"
+        _, path = env_redis.split(":", maxsplit=1)
+        # Optionally setting a db number
+        if "?db=" in env_redis:
+            path, number = path.split("?db=")
+            return (f"redis+socket:{path}?virtual_host={number}", env_redis)
+        else:
+            return (f"redis+socket:{path}", env_redis)
+
+    elif "+socket" in env_redis.lower():
+        # celery socket style, looks like:
+        # "redis+socket:///path/to/redis.sock"
+        _, path = env_redis.split(":", maxsplit=1)
+        if "?virtual_host=" in env_redis:
+            # Virtual host (aka db number)
+            path, number = path.split("?virtual_host=")
+            return (env_redis, f"unix:{path}?db={number}")
+        else:
+            return (env_redis, f"unix:{path}")
+
+    # Not a socket
+    return (env_redis, env_redis)
+
+
+def parse_beat_schedule() -> dict:
+    """
+    Configures the scheduled tasks, according to default or
+    environment variables.  Task expiration is configured so the task will
+    expire (and not run), shortly before the default frequency will put another
+    of the same task into the queue
+
+
+    https://docs.celeryq.dev/en/stable/userguide/periodic-tasks.html#beat-entries
+    https://docs.celeryq.dev/en/latest/userguide/calling.html#expiration
+    """
+    schedule = {}
+    tasks = [
+        {
+            "name": "Check all e-mail accounts",
+            "env_key": "PAPERLESS_EMAIL_TASK_CRON",
+            # Default every ten minutes
+            "env_default": "*/10 * * * *",
+            "task": "paperless_mail.tasks.process_mail_accounts",
+            "options": {
+                # 1 minute before default schedule sends again
+                "expires": 9.0 * 60.0,
+            },
+        },
+        {
+            "name": "Train the classifier",
+            "env_key": "PAPERLESS_TRAIN_TASK_CRON",
+            # Default hourly at 5 minutes past the hour
+            "env_default": "5 */1 * * *",
+            "task": "documents.tasks.train_classifier",
+            "options": {
+                # 1 minute before default schedule sends again
+                "expires": 59.0 * 60.0,
+            },
+        },
+        {
+            "name": "Optimize the index",
+            "env_key": "PAPERLESS_INDEX_TASK_CRON",
+            # Default daily at midnight
+            "env_default": "0 0 * * *",
+            "task": "documents.tasks.index_optimize",
+            "options": {
+                # 1 hour before default schedule sends again
+                "expires": 23.0 * 60.0 * 60.0,
+            },
+        },
+        {
+            "name": "Perform sanity check",
+            "env_key": "PAPERLESS_SANITY_TASK_CRON",
+            # Default Sunday at 00:30
+            "env_default": "30 0 * * sun",
+            "task": "documents.tasks.sanity_check",
+            "options": {
+                # 1 hour before default schedule sends again
+                "expires": ((7.0 * 24.0) - 1.0) * 60.0 * 60.0,
+            },
+        },
+        {
+            "name": "Empty trash",
+            "env_key": "PAPERLESS_EMPTY_TRASH_TASK_CRON",
+            # Default daily at 01:00
+            "env_default": "0 1 * * *",
+            "task": "documents.tasks.empty_trash",
+            "options": {
+                # 1 hour before default schedule sends again
+                "expires": 23.0 * 60.0 * 60.0,
+            },
+        },
+        {
+            "name": "Check and run scheduled workflows",
+            "env_key": "PAPERLESS_WORKFLOW_SCHEDULED_TASK_CRON",
+            # Default hourly at 5 minutes past the hour
+            "env_default": "5 */1 * * *",
+            "task": "documents.tasks.check_scheduled_workflows",
+            "options": {
+                # 1 minute before default schedule sends again
+                "expires": 59.0 * 60.0,
+            },
+        },
+        {
+            "name": "Rebuild LLM index",
+            "env_key": "PAPERLESS_LLM_INDEX_TASK_CRON",
+            # Default daily at 02:10
+            "env_default": "10 2 * * *",
+            "task": "documents.tasks.llmindex_index",
+            "options": {
+                # 1 hour before default schedule sends again
+                "expires": 23.0 * 60.0 * 60.0,
+            },
+        },
+        {
+            "name": "Cleanup expired share link bundles",
+            "env_key": "PAPERLESS_SHARE_LINK_BUNDLE_CLEANUP_CRON",
+            # Default daily at 02:00
+            "env_default": "0 2 * * *",
+            "task": "documents.tasks.cleanup_expired_share_link_bundles",
+            "options": {
+                # 1 hour before default schedule sends again
+                "expires": 23.0 * 60.0 * 60.0,
+            },
+        },
+    ]
+    for task in tasks:
+        # Either get the environment setting or use the default
+        value = os.getenv(task["env_key"], task["env_default"])
+        # Don't add disabled tasks to the schedule
+        if value == "disable":
+            continue
+        # I find https://crontab.guru/ super helpful
+        # crontab(5) format
+        #   - five time-and-date fields
+        #   - separated by at least one blank
+        minute, hour, day_month, month, day_week = value.split(" ")
+
+        schedule[task["name"]] = {
+            "task": task["task"],
+            "schedule": crontab(minute, hour, day_week, day_month, month),
+            "options": task["options"],
+        }
+
+    return schedule
+
 
 def parse_db_settings(data_dir: Path) -> dict[str, dict[str, Any]]:
     """Parse database settings from environment variables.
@@ -120,3 +300,48 @@ def parse_db_settings(data_dir: Path) -> dict[str, dict[str, Any]]:
     )
 
     return {"default": db_config}
+
+
+def parse_dateparser_languages(languages: str | None) -> list[str]:
+    language_list = languages.split("+") if languages else []
+    # There is an unfixed issue in zh-Hant and zh-Hans locales in the dateparser lib.
+    # See: https://github.com/scrapinghub/dateparser/issues/875
+    for index, language in enumerate(language_list):
+        if language.startswith("zh-") and "zh" not in language_list:
+            logger.warning(
+                f"Chinese locale detected: {language}. dateparser might fail to parse"
+                f' some dates with this locale, so Chinese ("zh") will be used as a fallback.',
+            )
+            language_list.append("zh")
+
+    return list(LocaleDataLoader().get_locale_map(locales=language_list))
+
+
+def parse_ignore_dates(
+    env_ignore: str,
+    date_order: str,
+) -> set[datetime.date]:
+    """
+    If the PAPERLESS_IGNORE_DATES environment variable is set, parse the
+    user provided string(s) into dates
+
+    Args:
+        env_ignore (str): The value of the environment variable, comma separated dates
+        date_order (str): The format of the date strings.
+
+    Returns:
+        set[datetime.date]: The set of parsed date objects
+    """
+    import dateparser
+
+    ignored_dates = set()
+    for s in env_ignore.split(","):
+        d = dateparser.parse(
+            s,
+            settings={
+                "DATE_ORDER": date_order,
+            },
+        )
+        if d:
+            ignored_dates.add(d.date())
+    return ignored_dates

src/paperless/settings/parsers.py

@@ -156,6 +156,108 @@ def parse_dict_from_str(
     return settings
 
 
+def get_bool_from_env(key: str, default: str = "NO") -> bool:
+    """
+    Return a boolean value based on whatever the user has supplied in the
+    environment based on whether the value "looks like" it's True or not.
+    """
+    return str_to_bool(os.getenv(key, default))
+
+
+@overload
+def get_float_from_env(key: str) -> float | None: ...
+
+
+@overload
+def get_float_from_env(key: str, default: None) -> float | None: ...
+
+
+@overload
+def get_float_from_env(key: str, default: float) -> float: ...
+
+
+def get_float_from_env(key: str, default: float | None = None) -> float | None:
+    """
+    Return a float value based on the environment variable.
+    If default is provided, returns that value when key is missing.
+    If default is None, returns None when key is missing.
+    """
+    if key not in os.environ:
+        return default
+
+    return float(os.environ[key])
+
+
+@overload
+def get_path_from_env(key: str) -> Path | None: ...
+
+
+@overload
+def get_path_from_env(key: str, default: None) -> Path | None: ...
+
+
+@overload
+def get_path_from_env(key: str, default: Path | str) -> Path: ...
+
+
+def get_path_from_env(key: str, default: Path | str | None = None) -> Path | None:
+    """
+    Return a Path object based on the environment variable.
+    If default is provided, returns that value when key is missing.
+    If default is None, returns None when key is missing.
+    """
+    if key not in os.environ:
+        return default if default is None else Path(default).resolve()
+
+    return Path(os.environ[key]).resolve()
+
+
+def get_list_from_env(
+    key: str,
+    separator: str = ",",
+    default: list[T] | None = None,
+    *,
+    strip_whitespace: bool = True,
+    remove_empty: bool = True,
+    required: bool = False,
+) -> list[str] | list[T]:
+    """
+    Get and parse a list from an environment variable or return a default.
+
+    Args:
+        key: Environment variable name
+        separator: Character(s) to split on (default: ',')
+        default: Default value to return if env var is not set or empty
+        strip_whitespace: Whether to strip whitespace from each element
+        remove_empty: Whether to remove empty strings from the result
+        required: If True, raise an error when the env var is missing and no default provided
+
+    Returns:
+        List of strings or list of type-cast values, or default if env var is empty/None
+
+    Raises:
+        ValueError: If required=True and env var is missing and there is no default
+    """
+    # Get the environment variable value
+    env_value = os.environ.get(key)
+
+    # Handle required environment variables
+    if required and env_value is None and default is None:
+        raise ValueError(f"Required environment variable '{key}' is not set")
+
+    if env_value:
+        items = env_value.split(separator)
+        if strip_whitespace:
+            items = [item.strip() for item in items]
+        if remove_empty:
+            items = [item for item in items if item]
+        return items
+    elif default is not None:
+        return default
+    else:
+        return []
+
+
 def get_choice_from_env(
     env_key: str,
     choices: set[str],

src/paperless/tests/settings/test_custom_parsers.py

@@ -1,10 +1,279 @@
+import datetime
 import os
 from pathlib import Path
+from typing import Any
 
 import pytest
+from celery.schedules import crontab
 from pytest_mock import MockerFixture
 
+from paperless.settings.custom import parse_beat_schedule
+from paperless.settings.custom import parse_dateparser_languages
 from paperless.settings.custom import parse_db_settings
+from paperless.settings.custom import parse_hosting_settings
+from paperless.settings.custom import parse_ignore_dates
+from paperless.settings.custom import parse_redis_url
+
+
+class TestRedisSocketConversion:
+    @pytest.mark.parametrize(
+        ("input_url", "expected"),
+        [
+            pytest.param(
+                None,
+                ("redis://localhost:6379", "redis://localhost:6379"),
+                id="none_uses_default",
+            ),
+            pytest.param(
+                "redis+socket:///run/redis/redis.sock",
+                (
+                    "redis+socket:///run/redis/redis.sock",
+                    "unix:///run/redis/redis.sock",
+                ),
+                id="celery_style_socket",
+            ),
+            pytest.param(
+                "unix:///run/redis/redis.sock",
+                (
+                    "redis+socket:///run/redis/redis.sock",
+                    "unix:///run/redis/redis.sock",
+                ),
+                id="redis_py_style_socket",
+            ),
+            pytest.param(
+                "redis+socket:///run/redis/redis.sock?virtual_host=5",
+                (
+                    "redis+socket:///run/redis/redis.sock?virtual_host=5",
+                    "unix:///run/redis/redis.sock?db=5",
+                ),
+                id="celery_style_socket_with_db",
+            ),
+            pytest.param(
+                "unix:///run/redis/redis.sock?db=10",
+                (
+                    "redis+socket:///run/redis/redis.sock?virtual_host=10",
+                    "unix:///run/redis/redis.sock?db=10",
+                ),
+                id="redis_py_style_socket_with_db",
+            ),
+            pytest.param(
+                "redis://myredishost:6379",
+                ("redis://myredishost:6379", "redis://myredishost:6379"),
+                id="host_with_port_unchanged",
+            ),
+            # Credentials in unix:// URL contain multiple colons (user:password@)
+            # Regression test for https://github.com/paperless-ngx/paperless-ngx/pull/12239
+            pytest.param(
+                "unix://user:password@/run/redis/redis.sock",
+                (
+                    "redis+socket://user:password@/run/redis/redis.sock",
+                    "unix://user:password@/run/redis/redis.sock",
+                ),
+                id="redis_py_style_socket_with_credentials",
+            ),
+            pytest.param(
+                "redis+socket://user:password@/run/redis/redis.sock",
+                (
+                    "redis+socket://user:password@/run/redis/redis.sock",
+                    "unix://user:password@/run/redis/redis.sock",
+                ),
+                id="celery_style_socket_with_credentials",
+            ),
+        ],
+    )
+    def test_redis_socket_parsing(
+        self,
+        input_url: str | None,
+        expected: tuple[str, str],
+    ) -> None:
+        """
+        GIVEN:
+            - Various Redis connection URI formats
+        WHEN:
+            - The URI is parsed
+        THEN:
+            - Socket based URIs are translated
+            - Non-socket URIs are unchanged
+            - None provided uses default
+        """
+        result = parse_redis_url(input_url)
+        assert expected == result
+
+
+class TestParseHostingSettings:
+    @pytest.mark.parametrize(
+        ("env", "expected"),
+        [
+            pytest.param(
+                {},
+                (
+                    None,
+                    "/",
+                    "/accounts/login/",
+                    "/dashboard",
+                    "/accounts/login/?loggedout=1",
+                ),
+                id="no_env_vars",
+            ),
+            pytest.param(
+                {"PAPERLESS_FORCE_SCRIPT_NAME": "/paperless"},
+                (
+                    "/paperless",
+                    "/paperless/",
+                    "/paperless/accounts/login/",
+                    "/paperless/dashboard",
+                    "/paperless/accounts/login/?loggedout=1",
+                ),
+                id="force_script_name_only",
+            ),
+            pytest.param(
+                {
+                    "PAPERLESS_FORCE_SCRIPT_NAME": "/docs",
+                    "PAPERLESS_LOGOUT_REDIRECT_URL": "/custom/logout",
+                },
+                (
+                    "/docs",
+                    "/docs/",
+                    "/docs/accounts/login/",
+                    "/docs/dashboard",
+                    "/custom/logout",
+                ),
+                id="force_script_name_and_logout_redirect",
+            ),
+        ],
+    )
+    def test_parse_hosting_settings(
+        self,
+        mocker: MockerFixture,
+        env: dict[str, str],
+        expected: tuple[str | None, str, str, str, str],
+    ) -> None:
+        """Test parse_hosting_settings with various env configurations."""
+        mocker.patch.dict(os.environ, env, clear=True)
+
+        result = parse_hosting_settings()
+
+        assert result == expected
+
+
+def make_expected_schedule(
+    overrides: dict[str, dict[str, Any]] | None = None,
+    disabled: set[str] | None = None,
+) -> dict[str, Any]:
+    """
+    Build the expected schedule with optional overrides and disabled tasks.
+    """
+
+    mail_expire = 9.0 * 60.0
+    classifier_expire = 59.0 * 60.0
+    index_expire = 23.0 * 60.0 * 60.0
+    sanity_expire = ((7.0 * 24.0) - 1.0) * 60.0 * 60.0
+    empty_trash_expire = 23.0 * 60.0 * 60.0
+    workflow_expire = 59.0 * 60.0
+    llm_index_expire = 23.0 * 60.0 * 60.0
+    share_link_cleanup_expire = 23.0 * 60.0 * 60.0
+
+    schedule: dict[str, Any] = {
+        "Check all e-mail accounts": {
+            "task": "paperless_mail.tasks.process_mail_accounts",
+            "schedule": crontab(minute="*/10"),
+            "options": {"expires": mail_expire},
+        },
+        "Train the classifier": {
+            "task": "documents.tasks.train_classifier",
+            "schedule": crontab(minute="5", hour="*/1"),
+            "options": {"expires": classifier_expire},
+        },
+        "Optimize the index": {
+            "task": "documents.tasks.index_optimize",
+            "schedule": crontab(minute=0, hour=0),
+            "options": {"expires": index_expire},
+        },
+        "Perform sanity check": {
+            "task": "documents.tasks.sanity_check",
+            "schedule": crontab(minute=30, hour=0, day_of_week="sun"),
+            "options": {"expires": sanity_expire},
+        },
+        "Empty trash": {
+            "task": "documents.tasks.empty_trash",
+            "schedule": crontab(minute=0, hour="1"),
+            "options": {"expires": empty_trash_expire},
+        },
+        "Check and run scheduled workflows": {
+            "task": "documents.tasks.check_scheduled_workflows",
+            "schedule": crontab(minute="5", hour="*/1"),
+            "options": {"expires": workflow_expire},
+        },
+        "Rebuild LLM index": {
+            "task": "documents.tasks.llmindex_index",
+            "schedule": crontab(minute="10", hour="2"),
+            "options": {"expires": llm_index_expire},
+        },
+        "Cleanup expired share link bundles": {
+            "task": "documents.tasks.cleanup_expired_share_link_bundles",
+            "schedule": crontab(minute=0, hour="2"),
+            "options": {"expires": share_link_cleanup_expire},
+        },
+    }
+
+    overrides = overrides or {}
+    disabled = disabled or set()
+
+    for key, val in overrides.items():
+        schedule[key] = {**schedule.get(key, {}), **val}
+
+    for key in disabled:
+        schedule.pop(key, None)
+
+    return schedule
+
+
+class TestParseBeatSchedule:
+    @pytest.mark.parametrize(
+        ("env", "expected"),
+        [
+            pytest.param({}, make_expected_schedule(), id="defaults"),
+            pytest.param(
+                {"PAPERLESS_EMAIL_TASK_CRON": "*/50 * * * mon"},
+                make_expected_schedule(
+                    overrides={
+                        "Check all e-mail accounts": {
+                            "schedule": crontab(minute="*/50", day_of_week="mon"),
+                        },
+                    },
+                ),
+                id="email-changed",
+            ),
+            pytest.param(
+                {"PAPERLESS_INDEX_TASK_CRON": "disable"},
+                make_expected_schedule(disabled={"Optimize the index"}),
+                id="index-disabled",
+            ),
+            pytest.param(
+                {
+                    "PAPERLESS_EMAIL_TASK_CRON": "disable",
+                    "PAPERLESS_TRAIN_TASK_CRON": "disable",
+                    "PAPERLESS_SANITY_TASK_CRON": "disable",
+                    "PAPERLESS_INDEX_TASK_CRON": "disable",
+                    "PAPERLESS_EMPTY_TRASH_TASK_CRON": "disable",
+                    "PAPERLESS_WORKFLOW_SCHEDULED_TASK_CRON": "disable",
+                    "PAPERLESS_LLM_INDEX_TASK_CRON": "disable",
+                    "PAPERLESS_SHARE_LINK_BUNDLE_CLEANUP_CRON": "disable",
+                },
+                {},
+                id="all-disabled",
+            ),
+        ],
+    )
+    def test_parse_beat_schedule(
+        self,
+        env: dict[str, str],
+        expected: dict[str, Any],
+        mocker: MockerFixture,
+    ) -> None:
+        mocker.patch.dict(os.environ, env, clear=False)
+        schedule = parse_beat_schedule()
+        assert schedule == expected
 
 
 class TestParseDbSettings:
@@ -264,3 +533,85 @@ class TestParseDbSettings:
         settings = parse_db_settings(tmp_path)
 
         assert settings == expected_database_settings
+
+
+class TestParseIgnoreDates:
+    """Tests the parsing of the PAPERLESS_IGNORE_DATES setting value."""
+
+    def test_no_ignore_dates_set(self) -> None:
+        """
+        GIVEN:
+            - No ignore dates are set
+        THEN:
+            - No ignore dates are parsed
+        """
+        assert parse_ignore_dates("", "YMD") == set()
+
+    @pytest.mark.parametrize(
+        ("env_str", "date_format", "expected"),
+        [
+            pytest.param(
+                "1985-05-01",
+                "YMD",
+                {datetime.date(1985, 5, 1)},
+                id="single-ymd",
+            ),
+            pytest.param(
+                "1985-05-01,1991-12-05",
+                "YMD",
+                {datetime.date(1985, 5, 1), datetime.date(1991, 12, 5)},
+                id="multiple-ymd",
+            ),
+            pytest.param(
+                "2010-12-13",
+                "YMD",
+                {datetime.date(2010, 12, 13)},
+                id="single-ymd-2",
+            ),
+            pytest.param(
+                "11.01.10",
+                "DMY",
+                {datetime.date(2010, 1, 11)},
+                id="single-dmy",
+            ),
+            pytest.param(
+                "11.01.2001,15-06-1996",
+                "DMY",
+                {datetime.date(2001, 1, 11), datetime.date(1996, 6, 15)},
+                id="multiple-dmy",
+            ),
+        ],
+    )
+    def test_ignore_dates_parsed(
+        self,
+        env_str: str,
+        date_format: str,
+        expected: set[datetime.date],
+    ) -> None:
+        """
+        GIVEN:
+            - Ignore dates are set per certain inputs
+        THEN:
+            - All ignore dates are parsed
+        """
+        assert parse_ignore_dates(env_str, date_format) == expected
+
+
+@pytest.mark.parametrize(
+    ("languages", "expected"),
+    [
+        ("de", ["de"]),
+        ("zh", ["zh"]),
+        ("fr+en", ["fr", "en"]),
+        # Locales must be supported
+        ("en-001+fr-CA", ["en-001", "fr-CA"]),
+        ("en-001+fr", ["en-001", "fr"]),
+        # Special case for Chinese: variants seem to miss some dates,
+        # so we always add "zh" as a fallback.
+        ("en+zh-Hans-HK", ["en", "zh-Hans-HK", "zh"]),
+        ("en+zh-Hans", ["en", "zh-Hans", "zh"]),
+        ("en+zh-Hans+zh-Hant", ["en", "zh-Hans", "zh-Hant", "zh"]),
+    ],
+)
+def test_parse_dateparser_languages(languages: str, expected: list[str]) -> None:
+    assert sorted(parse_dateparser_languages(languages)) == sorted(expected)

src/paperless/tests/settings/test_environment_parsers.py

@@ -4,8 +4,12 @@ from pathlib import Path
 import pytest
 from pytest_mock import MockerFixture
 
+from paperless.settings.parsers import get_bool_from_env
 from paperless.settings.parsers import get_choice_from_env
+from paperless.settings.parsers import get_float_from_env
 from paperless.settings.parsers import get_int_from_env
+from paperless.settings.parsers import get_list_from_env
+from paperless.settings.parsers import get_path_from_env
 from paperless.settings.parsers import parse_dict_from_str
 from paperless.settings.parsers import str_to_bool
 
@@ -205,6 +209,29 @@ class TestParseDictFromString:
         assert isinstance(result["database"]["port"], int)
 
 
+class TestGetBoolFromEnv:
+    def test_existing_env_var(self, mocker):
+        """Test that an existing environment variable is read and converted."""
+        mocker.patch.dict(os.environ, {"TEST_VAR": "true"})
+        assert get_bool_from_env("TEST_VAR") is True
+
+    def test_missing_env_var_uses_default_no(self, mocker):
+        """Test that a missing environment variable uses default 'NO' and returns False."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        assert get_bool_from_env("MISSING_VAR") is False
+
+    def test_missing_env_var_with_explicit_default(self, mocker):
+        """Test that a missing environment variable uses the provided default."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        assert get_bool_from_env("MISSING_VAR", default="yes") is True
+
+    def test_invalid_value_raises_error(self, mocker):
+        """Test that an invalid value raises ValueError (delegates to str_to_bool)."""
+        mocker.patch.dict(os.environ, {"INVALID_VAR": "maybe"})
+        with pytest.raises(ValueError):
+            get_bool_from_env("INVALID_VAR")
+
+
 class TestGetIntFromEnv:
     @pytest.mark.parametrize(
         ("env_value", "expected"),
@@ -259,6 +286,199 @@ class TestGetIntFromEnv:
             get_int_from_env("INVALID_INT")
 
 
+class TestGetFloatFromEnv:
+    @pytest.mark.parametrize(
+        ("env_value", "expected"),
+        [
+            pytest.param("3.14", 3.14, id="pi"),
+            pytest.param("42", 42.0, id="int_as_float"),
+            pytest.param("-2.5", -2.5, id="negative"),
+            pytest.param("0.0", 0.0, id="zero_float"),
+            pytest.param("0", 0.0, id="zero_int"),
+            pytest.param("1.5e2", 150.0, id="sci_positive"),
+            pytest.param("1e-3", 0.001, id="sci_negative"),
+            pytest.param("-1.23e4", -12300.0, id="sci_large"),
+        ],
+    )
+    def test_existing_env_var_valid_floats(self, mocker, env_value, expected):
+        """Test that existing environment variables with valid floats return correct values."""
+        mocker.patch.dict(os.environ, {"FLOAT_VAR": env_value})
+        assert get_float_from_env("FLOAT_VAR") == expected
+
+    @pytest.mark.parametrize(
+        ("default", "expected"),
+        [
+            pytest.param(3.14, 3.14, id="pi_default"),
+            pytest.param(0.0, 0.0, id="zero_default"),
+            pytest.param(-2.5, -2.5, id="negative_default"),
+            pytest.param(None, None, id="none_default"),
+        ],
+    )
+    def test_missing_env_var_with_defaults(self, mocker, default, expected):
+        """Test that missing environment variables return provided defaults."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        assert get_float_from_env("MISSING_VAR", default=default) == expected
+
+    def test_missing_env_var_no_default(self, mocker):
+        """Test that missing environment variable with no default returns None."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        assert get_float_from_env("MISSING_VAR") is None
+
+    @pytest.mark.parametrize(
+        "invalid_value",
+        [
+            pytest.param("not_a_number", id="text"),
+            pytest.param("42.5.0", id="double_decimal"),
+            pytest.param("42a", id="alpha_suffix"),
+            pytest.param("", id="empty"),
+            pytest.param(" ", id="whitespace"),
+            pytest.param("true", id="boolean"),
+            pytest.param("1.2.3", id="triple_decimal"),
+        ],
+    )
+    def test_invalid_float_values_raise_error(self, mocker, invalid_value):
+        """Test that invalid float values raise ValueError."""
+        mocker.patch.dict(os.environ, {"INVALID_FLOAT": invalid_value})
+        with pytest.raises(ValueError):
+            get_float_from_env("INVALID_FLOAT")
+
+
+class TestGetPathFromEnv:
+    @pytest.mark.parametrize(
+        "env_value",
+        [
+            pytest.param("/tmp/test", id="absolute"),
+            pytest.param("relative/path", id="relative"),
+            pytest.param("/path/with spaces/file.txt", id="spaces"),
+            pytest.param(".", id="current_dir"),
+            pytest.param("..", id="parent_dir"),
+            pytest.param("/", id="root"),
+        ],
+    )
+    def test_existing_env_var_paths(self, mocker, env_value):
+        """Test that existing environment variables with paths return resolved Path objects."""
+        mocker.patch.dict(os.environ, {"PATH_VAR": env_value})
+        result = get_path_from_env("PATH_VAR")
+        assert isinstance(result, Path)
+        assert result == Path(env_value).resolve()
+
+    def test_missing_env_var_no_default(self, mocker):
+        """Test that missing environment variable with no default returns None."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        assert get_path_from_env("MISSING_VAR") is None
+
+    def test_missing_env_var_with_none_default(self, mocker):
+        """Test that missing environment variable with None default returns None."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        assert get_path_from_env("MISSING_VAR", default=None) is None
+
+    @pytest.mark.parametrize(
+        "default_path_str",
+        [
+            pytest.param("/default/path", id="absolute_default"),
+            pytest.param("relative/default", id="relative_default"),
+            pytest.param(".", id="current_default"),
+        ],
+    )
+    def test_missing_env_var_with_path_defaults(self, mocker, default_path_str):
+        """Test that missing environment variables return resolved default Path objects."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        default_path = Path(default_path_str)
+        result = get_path_from_env("MISSING_VAR", default=default_path)
+        assert isinstance(result, Path)
+        assert result == default_path.resolve()
+
+    def test_relative_paths_are_resolved(self, mocker):
+        """Test that relative paths are properly resolved to absolute paths."""
+        mocker.patch.dict(os.environ, {"REL_PATH": "relative/path"})
+        result = get_path_from_env("REL_PATH")
+        assert result is not None
+        assert result.is_absolute()
+
+
+class TestGetListFromEnv:
+    @pytest.mark.parametrize(
+        ("env_value", "expected"),
+        [
+            pytest.param("a,b,c", ["a", "b", "c"], id="basic_comma_separated"),
+            pytest.param("single", ["single"], id="single_element"),
+            pytest.param("", [], id="empty_string"),
+            pytest.param("a, b , c", ["a", "b", "c"], id="whitespace_trimmed"),
+            pytest.param("a,,b,c", ["a", "b", "c"], id="empty_elements_removed"),
+        ],
+    )
+    def test_existing_env_var_basic_parsing(self, mocker, env_value, expected):
+        """Test that existing environment variables are parsed correctly."""
+        mocker.patch.dict(os.environ, {"LIST_VAR": env_value})
+        result = get_list_from_env("LIST_VAR")
+        assert result == expected
+
+    @pytest.mark.parametrize(
+        ("separator", "env_value", "expected"),
+        [
+            pytest.param("|", "a|b|c", ["a", "b", "c"], id="pipe_separator"),
+            pytest.param(":", "a:b:c", ["a", "b", "c"], id="colon_separator"),
+            pytest.param(";", "a;b;c", ["a", "b", "c"], id="semicolon_separator"),
+        ],
+    )
+    def test_custom_separators(self, mocker, separator, env_value, expected):
+        """Test that custom separators work correctly."""
+        mocker.patch.dict(os.environ, {"LIST_VAR": env_value})
+        result = get_list_from_env("LIST_VAR", separator=separator)
+        assert result == expected
+
+    @pytest.mark.parametrize(
+        ("default", "expected"),
+        [
+            pytest.param(
+                ["default1", "default2"],
+                ["default1", "default2"],
+                id="string_list_default",
+            ),
+            pytest.param([1, 2, 3], [1, 2, 3], id="int_list_default"),
+            pytest.param(None, [], id="none_default_returns_empty_list"),
+        ],
+    )
+    def test_missing_env_var_with_defaults(self, mocker, default, expected):
+        """Test that missing environment variables return provided defaults."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        result = get_list_from_env("MISSING_VAR", default=default)
+        assert result == expected
+
+    def test_missing_env_var_no_default(self, mocker):
+        """Test that missing environment variable with no default returns empty list."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        result = get_list_from_env("MISSING_VAR")
+        assert result == []
+
+    def test_required_env_var_missing_raises_error(self, mocker):
+        """Test that missing required environment variable raises ValueError."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        with pytest.raises(
+            ValueError,
+            match="Required environment variable 'REQUIRED_VAR' is not set",
+        ):
+            get_list_from_env("REQUIRED_VAR", required=True)
+
+    def test_required_env_var_with_default_does_not_raise(self, mocker):
+        """Test that required environment variable with default does not raise error."""
+        mocker.patch.dict(os.environ, {}, clear=True)
+        result = get_list_from_env("REQUIRED_VAR", default=["default"], required=True)
+        assert result == ["default"]
+
+    def test_strip_whitespace_false(self, mocker):
+        """Test that whitespace is preserved when strip_whitespace=False."""
+        mocker.patch.dict(os.environ, {"LIST_VAR": " a , b , c "})
+        result = get_list_from_env("LIST_VAR", strip_whitespace=False)
+        assert result == [" a ", " b ", " c "]
+
+    def test_remove_empty_false(self, mocker):
+        """Test that empty elements are preserved when remove_empty=False."""
+        mocker.patch.dict(os.environ, {"LIST_VAR": "a,,b,,c"})
+        result = get_list_from_env("LIST_VAR", remove_empty=False)
+        assert result == ["a", "", "b", "", "c"]
+
+
 class TestGetEnvChoice:
     @pytest.fixture
     def valid_choices(self) -> set[str]:
@@ -394,21 +614,3 @@ class TestGetEnvChoice:
         result = get_choice_from_env("TEST_ENV", large_choices)
 
         assert result == "option_50"
-
-    def test_different_env_keys(
-        self,
-        mocker: MockerFixture,
-        valid_choices: set[str],
-    ) -> None:
-        """Test function works with different environment variable keys."""
-        test_cases = [
-            ("DJANGO_ENV", "development"),
-            ("DATABASE_BACKEND", "staging"),
-            ("LOG_LEVEL", "production"),
-            ("APP_MODE", "development"),
-        ]
-
-        for env_key, env_value in test_cases:
-            mocker.patch.dict("os.environ", {env_key: env_value})
-            result = get_choice_from_env(env_key, valid_choices)
-            assert result == env_value

src/paperless/tests/settings/test_settings.py

@@ -0,0 +1,56 @@
+import os
+from unittest import TestCase
+from unittest import mock
+
+from paperless.settings import _parse_paperless_url
+from paperless.settings import default_threads_per_worker
+
+
+class TestThreadCalculation(TestCase):
+    def test_workers_threads(self) -> None:
+        """
+        GIVEN:
+            - Certain CPU counts
+        WHEN:
+            - Threads per worker is calculated
+        THEN:
+            - Threads per worker less than or equal to CPU count
+            - At least 1 thread per worker
+        """
+        default_workers = 1
+
+        for i in range(1, 64):
+            with mock.patch(
+                "paperless.settings.multiprocessing.cpu_count",
+            ) as cpu_count:
+                cpu_count.return_value = i
+
+                default_threads = default_threads_per_worker(default_workers)
+
+                self.assertGreaterEqual(default_threads, 1)
+
+                self.assertLessEqual(default_workers * default_threads, i)
+
+
+class TestPaperlessURLSettings(TestCase):
+    def test_paperless_url(self) -> None:
+        """
+        GIVEN:
+            - PAPERLESS_URL is set
+        WHEN:
+            - The URL is parsed
+        THEN:
+            - The URL is returned and present in related settings
+        """
+        with mock.patch.dict(
+            os.environ,
+            {
+                "PAPERLESS_URL": "https://example.com",
+            },
+        ):
+            url = _parse_paperless_url()
+            self.assertEqual("https://example.com", url)
+            from django.conf import settings
+
+            self.assertIn(url, settings.CSRF_TRUSTED_ORIGINS)
+            self.assertIn(url, settings.CORS_ALLOWED_ORIGINS)

src/paperless/tests/test_settings.py

@@ -1,482 +0,0 @@
-import datetime
-import os
-from unittest import TestCase
-from unittest import mock
-
-import pytest
-from celery.schedules import crontab
-
-from paperless.settings import _parse_base_paths
-from paperless.settings import _parse_beat_schedule
-from paperless.settings import _parse_dateparser_languages
-from paperless.settings import _parse_ignore_dates
-from paperless.settings import _parse_paperless_url
-from paperless.settings import _parse_redis_url
-from paperless.settings import default_threads_per_worker
-
-
-class TestIgnoreDateParsing(TestCase):
-    """
-    Tests the parsing of the PAPERLESS_IGNORE_DATES setting value
-    """
-
-    def _parse_checker(self, test_cases) -> None:
-        """
-        Helper function to check ignore date parsing
-
-        Args:
-            test_cases (_type_): _description_
-        """
-        for env_str, date_format, expected_date_set in test_cases:
-            self.assertSetEqual(
-                _parse_ignore_dates(env_str, date_format),
-                expected_date_set,
-            )
-
-    def test_no_ignore_dates_set(self) -> None:
-        """
-        GIVEN:
-            - No ignore dates are set
-        THEN:
-            - No ignore dates are parsed
-        """
-        self.assertSetEqual(_parse_ignore_dates(""), set())
-
-    def test_single_ignore_dates_set(self) -> None:
-        """
-        GIVEN:
-            - Ignore dates are set per certain inputs
-        THEN:
-            - All ignore dates are parsed
-        """
-        test_cases = [
-            ("1985-05-01", "YMD", {datetime.date(1985, 5, 1)}),
-            (
-                "1985-05-01,1991-12-05",
-                "YMD",
-                {datetime.date(1985, 5, 1), datetime.date(1991, 12, 5)},
-            ),
-            ("2010-12-13", "YMD", {datetime.date(2010, 12, 13)}),
-            ("11.01.10", "DMY", {datetime.date(2010, 1, 11)}),
-            (
-                "11.01.2001,15-06-1996",
-                "DMY",
-                {datetime.date(2001, 1, 11), datetime.date(1996, 6, 15)},
-            ),
-        ]
-
-        self._parse_checker(test_cases)
-
-
-class TestThreadCalculation(TestCase):
-    def test_workers_threads(self) -> None:
-        """
-        GIVEN:
-            - Certain CPU counts
-        WHEN:
-            - Threads per worker is calculated
-        THEN:
-            - Threads per worker less than or equal to CPU count
-            - At least 1 thread per worker
-        """
-        default_workers = 1
-
-        for i in range(1, 64):
-            with mock.patch(
-                "paperless.settings.multiprocessing.cpu_count",
-            ) as cpu_count:
-                cpu_count.return_value = i
-
-                default_threads = default_threads_per_worker(default_workers)
-
-                self.assertGreaterEqual(default_threads, 1)
-
-                self.assertLessEqual(default_workers * default_threads, i)
-
-
-class TestRedisSocketConversion(TestCase):
-    def test_redis_socket_parsing(self) -> None:
-        """
-        GIVEN:
-            - Various Redis connection URI formats
-        WHEN:
-            - The URI is parsed
-        THEN:
-            - Socket based URIs are translated
-            - Non-socket URIs are unchanged
-            - None provided uses default
-        """
-
-        for input, expected in [
-            # Nothing is set
-            (None, ("redis://localhost:6379", "redis://localhost:6379")),
-            # celery style
-            (
-                "redis+socket:///run/redis/redis.sock",
-                (
-                    "redis+socket:///run/redis/redis.sock",
-                    "unix:///run/redis/redis.sock",
-                ),
-            ),
-            # redis-py / channels-redis style
-            (
-                "unix:///run/redis/redis.sock",
-                (
-                    "redis+socket:///run/redis/redis.sock",
-                    "unix:///run/redis/redis.sock",
-                ),
-            ),
-            # celery style with db
-            (
-                "redis+socket:///run/redis/redis.sock?virtual_host=5",
-                (
-                    "redis+socket:///run/redis/redis.sock?virtual_host=5",
-                    "unix:///run/redis/redis.sock?db=5",
-                ),
-            ),
-            # redis-py / channels-redis style with db
-            (
-                "unix:///run/redis/redis.sock?db=10",
-                (
-                    "redis+socket:///run/redis/redis.sock?virtual_host=10",
-                    "unix:///run/redis/redis.sock?db=10",
-                ),
-            ),
-            # Just a host with a port
-            (
-                "redis://myredishost:6379",
-                ("redis://myredishost:6379", "redis://myredishost:6379"),
-            ),
-        ]:
-            result = _parse_redis_url(input)
-            self.assertTupleEqual(expected, result)
-
-
-class TestCeleryScheduleParsing(TestCase):
-    MAIL_EXPIRE_TIME = 9.0 * 60.0
-    CLASSIFIER_EXPIRE_TIME = 59.0 * 60.0
-    INDEX_EXPIRE_TIME = 23.0 * 60.0 * 60.0
-    SANITY_EXPIRE_TIME = ((7.0 * 24.0) - 1.0) * 60.0 * 60.0
-    EMPTY_TRASH_EXPIRE_TIME = 23.0 * 60.0 * 60.0
-    RUN_SCHEDULED_WORKFLOWS_EXPIRE_TIME = 59.0 * 60.0
-    LLM_INDEX_EXPIRE_TIME = 23.0 * 60.0 * 60.0
-    CLEANUP_EXPIRED_SHARE_BUNDLES_EXPIRE_TIME = 23.0 * 60.0 * 60.0
-
-    def test_schedule_configuration_default(self) -> None:
-        """
-        GIVEN:
-            - No configured task schedules
-        WHEN:
-            - The celery beat schedule is built
-        THEN:
-            - The default schedule is returned
-        """
-        schedule = _parse_beat_schedule()
-
-        self.assertDictEqual(
-            {
-                "Check all e-mail accounts": {
-                    "task": "paperless_mail.tasks.process_mail_accounts",
-                    "schedule": crontab(minute="*/10"),
-                    "options": {"expires": self.MAIL_EXPIRE_TIME},
-                },
-                "Train the classifier": {
-                    "task": "documents.tasks.train_classifier",
-                    "schedule": crontab(minute="5", hour="*/1"),
-                    "options": {"expires": self.CLASSIFIER_EXPIRE_TIME},
-                },
-                "Optimize the index": {
-                    "task": "documents.tasks.index_optimize",
-                    "schedule": crontab(minute=0, hour=0),
-                    "options": {"expires": self.INDEX_EXPIRE_TIME},
-                },
-                "Perform sanity check": {
-                    "task": "documents.tasks.sanity_check",
-                    "schedule": crontab(minute=30, hour=0, day_of_week="sun"),
-                    "options": {"expires": self.SANITY_EXPIRE_TIME},
-                },
-                "Empty trash": {
-                    "task": "documents.tasks.empty_trash",
-                    "schedule": crontab(minute=0, hour="1"),
-                    "options": {"expires": self.EMPTY_TRASH_EXPIRE_TIME},
-                },
-                "Check and run scheduled workflows": {
-                    "task": "documents.tasks.check_scheduled_workflows",
-                    "schedule": crontab(minute="5", hour="*/1"),
-                    "options": {"expires": self.RUN_SCHEDULED_WORKFLOWS_EXPIRE_TIME},
-                },
-                "Rebuild LLM index": {
-                    "task": "documents.tasks.llmindex_index",
-                    "schedule": crontab(minute=10, hour=2),
-                    "options": {
-                        "expires": self.LLM_INDEX_EXPIRE_TIME,
-                    },
-                },
-                "Cleanup expired share link bundles": {
-                    "task": "documents.tasks.cleanup_expired_share_link_bundles",
-                    "schedule": crontab(minute=0, hour=2),
-                    "options": {
-                        "expires": self.CLEANUP_EXPIRED_SHARE_BUNDLES_EXPIRE_TIME,
-                    },
-                },
-            },
-            schedule,
-        )
-
-    def test_schedule_configuration_changed(self) -> None:
-        """
-        GIVEN:
-            - Email task is configured non-default
-        WHEN:
-            - The celery beat schedule is built
-        THEN:
-            - The email task is configured per environment
-            - The default schedule is returned for other tasks
-        """
-        with mock.patch.dict(
-            os.environ,
-            {"PAPERLESS_EMAIL_TASK_CRON": "*/50 * * * mon"},
-        ):
-            schedule = _parse_beat_schedule()
-
-        self.assertDictEqual(
-            {
-                "Check all e-mail accounts": {
-                    "task": "paperless_mail.tasks.process_mail_accounts",
-                    "schedule": crontab(minute="*/50", day_of_week="mon"),
-                    "options": {"expires": self.MAIL_EXPIRE_TIME},
-                },
-                "Train the classifier": {
-                    "task": "documents.tasks.train_classifier",
-                    "schedule": crontab(minute="5", hour="*/1"),
-                    "options": {"expires": self.CLASSIFIER_EXPIRE_TIME},
-                },
-                "Optimize the index": {
-                    "task": "documents.tasks.index_optimize",
-                    "schedule": crontab(minute=0, hour=0),
-                    "options": {"expires": self.INDEX_EXPIRE_TIME},
-                },
-                "Perform sanity check": {
-                    "task": "documents.tasks.sanity_check",
-                    "schedule": crontab(minute=30, hour=0, day_of_week="sun"),
-                    "options": {"expires": self.SANITY_EXPIRE_TIME},
-                },
-                "Empty trash": {
-                    "task": "documents.tasks.empty_trash",
-                    "schedule": crontab(minute=0, hour="1"),
-                    "options": {"expires": self.EMPTY_TRASH_EXPIRE_TIME},
-                },
-                "Check and run scheduled workflows": {
-                    "task": "documents.tasks.check_scheduled_workflows",
-                    "schedule": crontab(minute="5", hour="*/1"),
-                    "options": {"expires": self.RUN_SCHEDULED_WORKFLOWS_EXPIRE_TIME},
-                },
-                "Rebuild LLM index": {
-                    "task": "documents.tasks.llmindex_index",
-                    "schedule": crontab(minute=10, hour=2),
-                    "options": {
-                        "expires": self.LLM_INDEX_EXPIRE_TIME,
-                    },
-                },
-                "Cleanup expired share link bundles": {
-                    "task": "documents.tasks.cleanup_expired_share_link_bundles",
-                    "schedule": crontab(minute=0, hour=2),
-                    "options": {
-                        "expires": self.CLEANUP_EXPIRED_SHARE_BUNDLES_EXPIRE_TIME,
-                    },
-                },
-            },
-            schedule,
-        )
-
-    def test_schedule_configuration_disabled(self) -> None:
-        """
-        GIVEN:
-            - Search index task is disabled
-        WHEN:
-            - The celery beat schedule is built
-        THEN:
-            - The search index task is not present
-            - The default schedule is returned for other tasks
-        """
-        with mock.patch.dict(os.environ, {"PAPERLESS_INDEX_TASK_CRON": "disable"}):
-            schedule = _parse_beat_schedule()
-
-        self.assertDictEqual(
-            {
-                "Check all e-mail accounts": {
-                    "task": "paperless_mail.tasks.process_mail_accounts",
-                    "schedule": crontab(minute="*/10"),
-                    "options": {"expires": self.MAIL_EXPIRE_TIME},
-                },
-                "Train the classifier": {
-                    "task": "documents.tasks.train_classifier",
-                    "schedule": crontab(minute="5", hour="*/1"),
-                    "options": {"expires": self.CLASSIFIER_EXPIRE_TIME},
-                },
-                "Perform sanity check": {
-                    "task": "documents.tasks.sanity_check",
-                    "schedule": crontab(minute=30, hour=0, day_of_week="sun"),
-                    "options": {"expires": self.SANITY_EXPIRE_TIME},
-                },
-                "Empty trash": {
-                    "task": "documents.tasks.empty_trash",
-                    "schedule": crontab(minute=0, hour="1"),
-                    "options": {"expires": self.EMPTY_TRASH_EXPIRE_TIME},
-                },
-                "Check and run scheduled workflows": {
-                    "task": "documents.tasks.check_scheduled_workflows",
-                    "schedule": crontab(minute="5", hour="*/1"),
-                    "options": {"expires": self.RUN_SCHEDULED_WORKFLOWS_EXPIRE_TIME},
-                },
-                "Rebuild LLM index": {
-                    "task": "documents.tasks.llmindex_index",
-                    "schedule": crontab(minute=10, hour=2),
-                    "options": {
-                        "expires": self.LLM_INDEX_EXPIRE_TIME,
-                    },
-                },
-                "Cleanup expired share link bundles": {
-                    "task": "documents.tasks.cleanup_expired_share_link_bundles",
-                    "schedule": crontab(minute=0, hour=2),
-                    "options": {
-                        "expires": self.CLEANUP_EXPIRED_SHARE_BUNDLES_EXPIRE_TIME,
-                    },
-                },
-            },
-            schedule,
-        )
-
-    def test_schedule_configuration_disabled_all(self) -> None:
-        """
-        GIVEN:
-            - All tasks are disabled
-        WHEN:
-            - The celery beat schedule is built
-        THEN:
-            - No tasks are scheduled
-        """
-        with mock.patch.dict(
-            os.environ,
-            {
-                "PAPERLESS_EMAIL_TASK_CRON": "disable",
-                "PAPERLESS_TRAIN_TASK_CRON": "disable",
-                "PAPERLESS_SANITY_TASK_CRON": "disable",
-                "PAPERLESS_INDEX_TASK_CRON": "disable",
-                "PAPERLESS_EMPTY_TRASH_TASK_CRON": "disable",
-                "PAPERLESS_WORKFLOW_SCHEDULED_TASK_CRON": "disable",
-                "PAPERLESS_LLM_INDEX_TASK_CRON": "disable",
-                "PAPERLESS_SHARE_LINK_BUNDLE_CLEANUP_CRON": "disable",
-            },
-        ):
-            schedule = _parse_beat_schedule()
-
-        self.assertDictEqual(
-            {},
-            schedule,
-        )
-
-
-class TestPaperlessURLSettings(TestCase):
-    def test_paperless_url(self) -> None:
-        """
-        GIVEN:
-            - PAPERLESS_URL is set
-        WHEN:
-            - The URL is parsed
-        THEN:
-            - The URL is returned and present in related settings
-        """
-        with mock.patch.dict(
-            os.environ,
-            {
-                "PAPERLESS_URL": "https://example.com",
-            },
-        ):
-            url = _parse_paperless_url()
-            self.assertEqual("https://example.com", url)
-            from django.conf import settings
-
-            self.assertIn(url, settings.CSRF_TRUSTED_ORIGINS)
-            self.assertIn(url, settings.CORS_ALLOWED_ORIGINS)
-
-
-class TestPathSettings(TestCase):
-    def test_default_paths(self) -> None:
-        """
-        GIVEN:
-            - PAPERLESS_FORCE_SCRIPT_NAME is not set
-        WHEN:
-            - Settings are parsed
-        THEN:
-            - Paths are as expected
-        """
-        base_paths = _parse_base_paths()
-        self.assertEqual(None, base_paths[0])  # FORCE_SCRIPT_NAME
-        self.assertEqual("/", base_paths[1])  # BASE_URL
-        self.assertEqual("/accounts/login/", base_paths[2])  # LOGIN_URL
-        self.assertEqual("/dashboard", base_paths[3])  # LOGIN_REDIRECT_URL
-        self.assertEqual(
-            "/accounts/login/?loggedout=1",
-            base_paths[4],
-        )  # LOGOUT_REDIRECT_URL
-
-    @mock.patch("os.environ", {"PAPERLESS_FORCE_SCRIPT_NAME": "/paperless"})
-    def test_subpath(self) -> None:
-        """
-        GIVEN:
-            - PAPERLESS_FORCE_SCRIPT_NAME is set
-        WHEN:
-            - Settings are parsed
-        THEN:
-            - The path is returned and present in related settings
-        """
-        base_paths = _parse_base_paths()
-        self.assertEqual("/paperless", base_paths[0])  # FORCE_SCRIPT_NAME
-        self.assertEqual("/paperless/", base_paths[1])  # BASE_URL
-        self.assertEqual("/paperless/accounts/login/", base_paths[2])  # LOGIN_URL
-        self.assertEqual("/paperless/dashboard", base_paths[3])  # LOGIN_REDIRECT_URL
-        self.assertEqual(
-            "/paperless/accounts/login/?loggedout=1",
-            base_paths[4],
-        )  # LOGOUT_REDIRECT_URL
-
-    @mock.patch(
-        "os.environ",
-        {
-            "PAPERLESS_FORCE_SCRIPT_NAME": "/paperless",
-            "PAPERLESS_LOGOUT_REDIRECT_URL": "/foobar/",
-        },
-    )
-    def test_subpath_with_explicit_logout_url(self) -> None:
-        """
-        GIVEN:
-            - PAPERLESS_FORCE_SCRIPT_NAME is set and so is PAPERLESS_LOGOUT_REDIRECT_URL
-        WHEN:
-            - Settings are parsed
-        THEN:
-            - The correct logout redirect URL is returned
-        """
-        base_paths = _parse_base_paths()
-        self.assertEqual("/paperless/", base_paths[1])  # BASE_URL
-        self.assertEqual("/foobar/", base_paths[4])  # LOGOUT_REDIRECT_URL
-
-
-@pytest.mark.parametrize(
-    ("languages", "expected"),
-    [
-        ("de", ["de"]),
-        ("zh", ["zh"]),
-        ("fr+en", ["fr", "en"]),
-        # Locales must be supported
-        ("en-001+fr-CA", ["en-001", "fr-CA"]),
-        ("en-001+fr", ["en-001", "fr"]),
-        # Special case for Chinese: variants seem to miss some dates,
-        # so we always add "zh" as a fallback.
-        ("en+zh-Hans-HK", ["en", "zh-Hans-HK", "zh"]),
-        ("en+zh-Hans", ["en", "zh-Hans", "zh"]),
-        ("en+zh-Hans+zh-Hant", ["en", "zh-Hans", "zh-Hant", "zh"]),
-    ],
-)
-def test_parser_date_parser_languages(languages, expected) -> None:
-    assert sorted(_parse_dateparser_languages(languages)) == sorted(expected)